Beinn Clachach is a Graham of 642.3 m in Highland. All four of its nearest neighbours are higher, up to Beinn Sgritheall at 974 m.
It sits below Beinn nan Caorach, only 1.9 km to the north-west and 131.7 m higher. The higher hill nearest to it, Beinn nan Caorach, is a Corbett, 1.9 km to the north-west. It is 223.4 m below the average height of the 427 register hills in Highland.